June in Siedlce averages a daily high of 23°C with nights around 11.2°C. Expect roughly 12.8 wet days totalling 74.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Siedlce is May–September.
Based on SIEDLCE, PL (9.5km), 1995–2024. 30 years of June data.